The script doesn't autodetect what type you are messing with, so it does require editing for whatever type you're using.
Fortunately, you said it shows all the frames. This means that it is either set to use default battlers for all your actors (or enemies), or it is set for a single actor to use a default RTP battler.
Check to see if there is a value called $default_actor_id = [1]. If there is, set the array to a mere [] , emptying it of the '1' which indicates the first actor. Or maybe you just have the $default_actors value set to true.